Constraining the Dark Universe
Abstract
We combine complementary datasets to constrain dark energy. Using standard Big Bang Nucleosynthesis and the observed abundances of primordial nuclides to put constraints on Q at temperatures near T 1MeV, we find the strong constraint Q(MeV) < 0.045 at 2σ c.l.. Under the assumption of flatness, using results from Cosmic Microwave Background (CMB) anisotropy measurements, high redshift supernovae (SN-Ia) observations and data from local cluster abundances we put a new constraint on the equation of state parameter wQ < -0.85 at 68% c.l..
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